David Castro (born February 7, 1996) is an American actor, known for his role as Raphael Santiago on the Freeform fantasy series Shadowhunters. Personal life Castro was born on Long Island, New York
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9f852c4096face9324883246aeb9c0404eb16a13ef29e978b0fe92a1ee11f9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e14ae6a-8f37-4743-a468-e2e2d977156f.json and https://artists.proofprofile.net/proofs/artist/5e14ae6a-8f37-4743-a468-e2e2d977156f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).